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Toxicological information

Skin irritation / corrosion

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Administrative data

Endpoint:
skin irritation: in vivo
Type of information:
migrated information: read-across based on grouping of substances (category approach)
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Well documented, near-guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1980
Report date:
1980

Materials and methods

Test guideline
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 404 (Acute Dermal Irritation / Corrosion)
Deviations:
yes
Remarks:
24 h exposure under occlusive conditions; no scoring after 48 h
GLP compliance:
no

Test material

Constituent 1
Chemical structure
Reference substance name:
Ammonium dihydrogenorthophosphate
EC Number:
231-764-5
EC Name:
Ammonium dihydrogenorthophosphate
Cas Number:
7722-76-1
Molecular formula:
H3N.H3O4P
IUPAC Name:
ammonium dihydrogen phosphate
Constituent 2
Reference substance name:
Monoammonium dihydrogenorthophosphate
IUPAC Name:
Monoammonium dihydrogenorthophosphate
Details on test material:
- Name of test material (as cited in study report): Monoammoniumphosphate, Härter 26 Pulver
- Analytical purity: no data

Test animals

Species:
rabbit
Strain:
Vienna White

Test system

Type of coverage:
occlusive
Preparation of test site:
shaved
Vehicle:
water
Controls:
no
Amount / concentration applied:
TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 0.5 g
- Concentration (if solution): 80%

Duration of treatment / exposure:
24 h
Observation period:
9 days
Number of animals:
3 male and 3 female

Results and discussion

In vivo

Resultsopen allclose all
Irritation parameter:
erythema score
Basis:
mean
Remarks:
3 animals
Time point:
24/48/72 h
Score:
0.66
Max. score:
4
Reversibility:
fully reversible within: 72 h
Remarks on result:
other: No experimental data available for 24 h reading; for calculation of mean scores, the 48 h values were assumed to be the same as those at 24 h (worst case assumption)
Irritation parameter:
erythema score
Basis:
mean
Remarks:
3 animals
Time point:
24/48/72 h
Score:
0
Max. score:
4
Reversibility:
other: not applicable
Remarks on result:
other: No experimental data available for 24 h reading; for calculation of mean scores, the 48 h values were assumed to be the same as those at 24 h (worst case assumption)
Irritation parameter:
edema score
Basis:
mean
Remarks:
6 animals
Time point:
24/48/72 h
Score:
0
Max. score:
4
Reversibility:
other: not applicable
Remarks on result:
other: No experimental data available for 24 h reading; for calculation of mean scores, the 48 h values were assumed to be the same as those at 24 h (worst case assumption)

Any other information on results incl. tables

time

animal 1

animal 2

animal 3

animal 4

animal 5

animal 6

erythema

24 h

1

1

0

0

0

1

72 h

0

0

0

0

0

0

9 d

0

0

0

0

0

0

edema

24 h

0

0

0

0

0

0

72 h

0

0

0

0

0

0

9 d

0

0

0

0

0

0

No experimental data available for 24 h reading; for calculation of mean scores, therefore the 48 h values were assumed to be the same as those at 24 h (worst case assumption).

Applicant's summary and conclusion

Interpretation of results:
not irritating
Remarks:
Migrated information Criteria used for interpretation of results: EU